MAX1641EEE+

The MAX1641EEE+ is an adjustable-output, switch-mode current source with synchronous rectifier in 16 pin QSOP package. This CMOS, adjustable-output, switch-mode current source operates from a +5.5V to +26V input is ideal for microprocessor-controlled battery chargers. Charging current, maximum output voltage and pulse-trickle charge are programmed with external resistors. Programming the off-time modifies the switching frequency, suppressing undesirable harmonics in noise-sensitive circuits. The MAX1640’s high side current sensing allows the load to connect directly to ground, eliminating ground-potential errors. The step-down pulse-width-modulation (PWM) controllers use an external P-channel MOSFET switch and an optional, external N-channel MOSFET synchronous rectifier for increased efficiency. An internal low-dropout linear regulator provides power for the internal reference and circuitry as well as the gate drive for the N-channel synchronous rectifier.

• Adjustable output voltage range from 2V to 24V
• Operating temperature range from -40°C to 85°C
• Efficiency is 95%
• PWM maximum duty cycle is 100%
• Up to 500KHz PWM operation
• Optional synchronous rectifier
• Current-sense accuracy is 2%

Applications

Power Management, Portable Devices

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party